On Mon, May 12, 2014 at 10:31 AM, Ashis Deb <ashisde...@gmail.com> wrote: > Hi all , > > > I have a GUI package , which I want to make it > work for a certain period,say-30days ,after which it should be self > destructive . > > Could it be possible ?? >
Yes. But why bother? Can you stop people: a) turning back the clock on their PCs? b) reinstalling again after 30 days? c) installing on a fresh operating system? d) editing the program to remove the date check? You have to decide if the effort in preventing all these things is worth it. Unless your software is really going to make you millions of dollars unless you do this, the answer is no. Easiest option is to just pop up a nag screen saying "You really should stop using this after 30 days", but don't bother trying to enforce it (and definitely don't go deleting it itself, you'll end up deleting someone's files and then they will sue you). With a nag screen, people who are going to buy your product will buy it, people who aren't going to buy your product will carry on using it, but then they are going to do that anyway since these measures are so easily circumvented. Unless you want to invest in some serious licensing infrastructure. Barry ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.